Fig. 9. Time-lapse analysis of MDT migration of DsRed cells in the MZ. (A) Schematic of time-lapse imaging in a flat-mount preparation from DsRed-labelled brain. (B) Confocal images of DsRed cells in the MZ. The number in the top right corner is the time in minutes. Neurons indicated by arrowheads of the same colour represent the same neurons. (B') Tracks of the four neurons shown in B. Each dot corresponds to the neurons shown by arrowheads in B and illustrates their positions plotted at 20 minutes intervals. Arrows indicate the direction of migration. (B'') Migration direction of all of the DsRed neurons shown in B. R, rostral; M, medial. Scale bar: 20 µm.